Folks
Dessicant will only absorb water. It will not absorb any outgases or plasticiser leaching from these plastic bags.
Medicinal quality hdpe ( high density polyethylene) will also contain oils carried over from the manufacturing process - these oils will be either medicinal white oils ( 80-130 ppm generally in the finished hdpe product) or PAG ( poly alkylene glycol based - generally 20-50 ppm carried over into the finished product)
Other additves - ie antioxidants, plasticisers etc may also be added to almost all plastics we come across in our daily lives
So, i would not store watches in plastic bags (of any sort), for a long period of time
Cheers paul
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